Pulley.



UNITED STATES* PATENT OFFICE.

WILLIAM .LoUDEN, oF FAIRFIELD, IowA.

PU LLEY.

sPEcrirIcArroNforming part of Letters Patent No. 700,212, dated May 2o, 1902. Application led April 30, 1901l Serial No. 58,106. (No model.)

To all whom, it may concern:

Be it known that I,WILLIAM LOUDEN, a citizen of the United States, residing at Fairfield, in the county of Jefferson and State of Iowa, have invented a new and useful Improvement in Pulleys, of which the following is a specification.

My invention relates to pulleys such as are used for hoisting purposes; and it consists in the improvement in the details hereinafter set forth, and more particularly pointed out in the claims. l Y v In the accompanying'drawings, Figure '1 is a side elevation. Fig. 2 is a vertical section on the line 2 2 of Fig. 1. Fig. 3 is a horizontal section on the line 3 3 of Fig. l. Fig. 4 is a perspective of the thimble upon which the sheave runs, and Fig. 5 is a side elevation of 'the swivel-eye.

proximately horizontal, the corners contain-a ing perforations for the rivets R being slightly extended upward to make room for them and leave a practically uniform space below-for the passage of the rope therethrough. rIhe seat for the swivel-eye E is immediately over the central rib F, and the perforations for theL rivets R over the side ribs B. The lower ends of the side ribs are merged into a circular-v shaped- .horizontallydisposed rib or plate G,

which intersects the middle portion of theV centralrib F. The ribs B, merged with the plate G, are then downwardlyand outwardly curved to form guards C and are then inwardly contracted and curved atl) and joined to the lower end of the central rib F, which terminates at this point, and, with its mate on the opposite side, forms a support for the sheave S. The ribs B and F are preferably curved outward in cross-section above the connecting-plate G to make room for the passage of a large or knotted rope. edges of the ribs B are outwardly rounded in horizontal 'section even up to the corners containing the rivets R, so as to prevent abrasion of the rope when" brought in contact therewith. The construction o f the ribs B and the upper ends of the frame are particularly advantageous when the pulley is secured to a oor with its eye below and the sheave S above. In that case when the rope is passing loosely through the pulley it will not come in contact with the guards C at all, and therefore it is essential that the upper partof the frame shall be constructed -to guide the rope smoothly through it. The inner faces of the plates G are preferably iitted with projections H to assist in guiding the rope into the groove of the sheave S.

The inner faces of the lower ends of the frames A, terminating with the junction of the rib F with the merged plate G and ribs B, are fitted with recesses and also with holes in the centers of said recesses. Into these re cesses the .ends of a thimble K are inserted, and a bolt .I is passed through the thimble and the holes in the recessed part of the frames A. The thimble K is preferably made of malleable iron andis made tapering and has its large end M c'ut down, as shown in Fig. 4,

vso it will be about the same size as the other end and will fit in recesses of the same size. The hole in the hub L of the sheave S is also made tapering to fit the thimble and is cast on a chill, so as to harden its inner faces. The molecules of the chilled iron in the hub and the annealed iron in the thimble being of a different texture will not interlock with -`each other, and this prevents to a considerable degree the abrasion of the parts and serves to prevent their wearing out lwhen heavily loaded. The hole inthe hub being made tapering, the chill. on which it is cast can be easily driven out of it, andthe thimble being made tapering to fit the hole and having its large end cut away to iit a recess of the same size as the small end can be set in the frame interchangeably and will stand true in the frame and will hold the sheave S in its proper position.

The groove in the sheave S is made sub- The outer' IOO stantially on the lines N, which cross each other at an angle, as shown in Fig. 2. The bottom of the angle is rounded out or filled in on a line substantially that of' the circle shown by the dotted lines X, and the edges of the groove are rounded off on lines substantially the same as that shown by the dotted lines Y, said circles leaving a substantial part of the lines of the angle between them. The diameter of the rope to be used should be aboutthe same size or a little larger than that of the circle X. By this means the rope can be drawn away over to one side without rubbing on the sharp edges of the sheave or being worn thereby. Also the bottom of `the groove being on the same or a little smaller circle than the diameter of the rope the rope will be held in shape in passing over the sheave instead of being flattened out of shape, as it is in ordinary sheaves.

rlhe swivel-eyeE is made of cast-iron,which is preferably annealed and is provided with a tubular neck O, and the upper parts of the framesAare fitted to encircle this neck. On the lower end of the neck a circular flange Pis formed to catch under the adjacent parts of the frame A, and above this a smaller flange Q is formed to prevent the neck O from passing too far down in the frame A. The eye E consists, mainly, of the body T, which is joined to the upper end of the neck O and is reinforced by the flange or web U, which encircles it, and is also joined to the upper part of the neck O and to the smaller flanges Q. This makes a very light, strong, and durable swivel-eye, and the neck being tubular the iron composingit will be free from shrinks or cracks and will be thoroughly annealed when made of malleable iron, which is preferable in an eye of this kind. The frame A is also light, well proportioned, and strong. Without covering the sheave all over the frame guides the rope eectually into the groove of the sheave, and there are no sharp or abrupt corners or edges on either the sheave or the frame to wear the rope.

What I claim isl. A pulley-frame consisting of adjoining sides having their upper ends approximately horizontal and secu rel y joined together, each side having a central vertical rib and two vertically-disposed side ribs having their outer edges outwardly rounded in horizontal section, and their lower ends merged into a circularshaped horizontallydisposed rib or plate intersecting the middle portion of the central rib, the merged plate and ribs being downwardly and outwardly curved to form guards, and then inwardly contracted and joined to the lower end of the central rib, substantially as described. 'f

2. The combination of a pulley-frame, an annealed iron thimble fixed in said frame, and a sheave having a hole in its hub with chilled or hardened faces, and adapted to run on said thimble, substantially as described.

3. The combination of a pulley-frame having recesses in the inner faces of its lower ends, a tapering thimble having a short section of its large end cut down to the same size as the small end, and both ends being adapted to fit in said recesses, and a wheel' with a tapering hole in its hub adapted to run on said tapering thimble, substantially as described.

4. The combination of a pulley-frame having recesses in the inner faces of its lower ends, a tapering thimble having a short section of its large end cut down to the same size as the small end, and both ends being adapted to fit in said recesses, a wheel with a tapering hole in itsl hub adapted to run on said tapering thiinble, and a bolt passing through said frame and thimble, substantially as described.

5. In a hoisting-pulley, a cast-iron swiveleye having a tubular neck, and a iiange on said neck to hold it in position in the pulleyframe, substantially as described.

(i. In a hoisting-pulley, a cast-iron swiveleye having a tubular neck and upper and lower flanges on said neck, the main part of said eye consisting of a body joined to the upper end of the neck and a web encircling said body and joined to the upper flange and to the sides of the neck above it, substantially as described.

7. The combination of a cast-iron swiveleye having a tubular neck and upper and lower flanges on said neck, a two-part pulleyframe adapted to fit and turn on said neck between said fia-nges, and a sheave journaled in the lower partof said frame, substantially as described.

8. In hoisting-pulleys, a sheave having a groove for a rope, the sides of which groove are set at an angle to each other, the bottom of the groove being filled out to form the segment of a circle and the edges of the groove being rounded off on the segment of acircle, said circles being of a size with respect to the size of the groove to leave a substantial part of the lines of the angle between them.

WILLIAM LOUDEN.

lVitnesses:

WIRT BERRY KING, EVERETT G. BELL.

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